package cn.bugstack.domain.activity.service.discount.impl;

import cn.bugstack.domain.activity.model.valobj.GroupBuyActivityDiscountVO;
import cn.bugstack.domain.activity.service.discount.AbstractDiscountCalculateService;
import cn.bugstack.types.common.Constants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;

/**
 * @Author caoyi
 * @description:
 * @Date 2025/7/30 21:17
 */
@Slf4j
@Service("MJ") //为了map注入
public class MJCalculateService extends AbstractDiscountCalculateService {

    @Override
    protected BigDecimal doCalculate(BigDecimal originalPrice, GroupBuyActivityDiscountVO.GroupBuyDiscount groupBuyDiscount) {
        log.info("优惠策略折扣计算:{}", groupBuyDiscount.getDiscountType().getCode());

        // 折扣表达式 - 100,10 满100减10元
        String marketExpr = groupBuyDiscount.getMarketExpr();
        String[] split = marketExpr.split(Constants.SPLIT);
        BigDecimal x=new BigDecimal(split[0].trim());
        BigDecimal y=new BigDecimal(split[1].trim());

        if(originalPrice.compareTo(x)<0){
            return originalPrice;
        }
        // 折扣价格
        BigDecimal deductionPrice = originalPrice.subtract(y);

        if(deductionPrice.compareTo(BigDecimal.ZERO)<0){
            return new BigDecimal("0.01");
        }
        return deductionPrice;
    }
}
